probe.d

synthetic checks from independent vantage points

HTTP, TCP and ICMP probes on a fixed interval. Two consecutive failures raise an alert. No agents to install, no data collection on your hosts.

current window

Rolling 24h, one cell per two hours. Aggregated across all vantage points.

what it checks

• status code, response body match, and redirect chain
• TCP connect time, split from TLS handshake time
• certificate expiry, with warnings at 30 / 14 / 7 days
• ICMP loss and jitter, sampled per vantage point

alerting

Webhook, email, or a plain GET to a URL you control. Payload is flat JSON; there is no schema to learn. Alerts fire on the second consecutive failure and resolve on the first success.

retention

contact

support at this domain. Include the check id; it is in every alert payload.